Browsing Faculty of Natural and Agricultural Sciences by Author "23567856 - Onwudiwe, Damian Chinedu"
Now showing items 1-20 of 47
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(2-Ethyl-2-oxazoline- kN)bis(N-ethyl-N-phenyldithiocarbamato- k2S,S')cadmium
Onwudiwe, Damian C.; Strydom, Christien A.; Hosten, Eric C. (International Union of Crystallography, 2012)In the title compound, [Cd(C9H10NS2)2(C5H9NO)], the CdII atom is five-coordinated in a distorted square-pyramidal geometry by four S atoms from two chelating N-ethyl-N- phenyl dithiocarbamate ligands and one N atom from a ... -
Biosynthesis and photocatalytic properties of SnO2 nanoparticles prepared using aqueous extract of cauliflower
Osuntokun, Jejenija; Onwudiwe, Damian C.; Ebenso, Eno E. (Springer, 2017)This work reports the biosynthesis of Sn(OH)2 using aqueous extract of fresh cauliflower (Brassica oleracea L. var. botrytis), and the subsequent preparation of SnO2 nanoparticles at two different annealing temperatures ... -
Biosynthesis, characterization, and antimicrobial effect of silver nanoparticles obtained using Lavandula × intermedia
Elemike, Elias E.; Onwudiwe, Damian C.; Ekennia, Anthony C.; Seru-Katata, Lebogang (SpringerSpringer, 2017)The use..... of aqueous leaf extract of Lavandula × intermedia for biosynthesis of silver nanoparticles (AgNPs) is presented. The plant extract was obtained by boiling dried leaves and using the obtained filtrate for the ... -
Biosynthesis, electrochemical, antimicrobial and antioxidant studies of silver nanoparticles mediated by talinum triangulare aqueous leaf extract
Elemike, Elias E.; Onwudiwe, Damian C.; Fayemi, Omololoa E.; Ekennia, Anthony C.; Ebenso, Eno E.; Tiedt, Louwrens R. (Springer, 2017)Silver nanoparticles (AgNPs) were synthesized using leaf extract of Talinum triangulare (TT). The nanoparticles were characterised using Infra-red spectroscopy, UV-vis spectroscopy, X-ray diffraction, scanning electron ... -
The bipyridine adducts of N-phenyldithiocarbamato complexes of Zn(II) and Cd(II); synthesis, spectral, thermal decomposition studies and use as precursors for ZnS and CdS nanoparticles
Onwudiwe, Damian C.; Strydom, Christien A. (Elsevier, 2015)Bipyridine adducts of N-phenyldithiocarbamato complexes, [ML12L2] (M = Cd(II), Zn(II); L1 = N-phenyldithiocarbamate, L2 = 2,2′ bipyridine), have been synthesized and characterised. The decomposition of these complexes to ... -
Bis diallyl dithiocarbamate Pt(II) complex: synthesis, characterization, thermal decomposition studies, and experimental and theoretical studies on its crystal structure
Onwudiwe, Damian C.; Mugo, Jane N.; Hrubaru, Madalina; Hosten, Eric (Taylor & Francis, 2015)Platinum dithiocarbamate (DTC) complex has been synthesized from the ligand diallyl DTC, and its structure was established from elemental analysis, IR, NMR, and single-crystal X-ray analyses to be Pt[S2CN(C3H5)2]2. The ... -
Bis(μ-N,N-diallyldithiocarbamato)bis (N,N-diallyldithiocarbamato)cadmium
Onwudiwe, Damian C.; Hrubaru, Madalina; Hosten, Eric C.; Arderne, Charmaine (International Union of Crystallography, 2017)The title compound, [Cd2(C7H10NS2)4], is a neutral dinuclear cadmium(II) complex bearing four bis N,N-diallyldithiocarbamate ligands coordinating to two CdII cations. In each of the monomeric subunits, there are four ... -
Colloidal synthesis of monodispersed ZnS and CdS nanocrystals from novel zinc and cadmium complexes
Onwudiwe, Damian C.; Mohammed, Aliyu D.; Strydom, Christien A.; Young, Desmond A.; Jordaan, Anine (Elsevier, 2014)Monodispersed spherical and hexagonal shaped ZnS and CdS nanocrystals respectively, have been synthesized using novel heteroleptic complexes of xanthate (S2CObu) and dithiocarbamate (S2CNMePh). The nanocrystals were prepared ... -
Colloidal-route synthesis of N-butylaniline capped ZnS and CdS nanoparticles
Onwudiwe, Damian C.; Strydom, Christien A. (Elsevier, 2013)A new secondary amine (N-butyl aniline) has been used as surfactant to synthesize monodispersed ZnS and CdS nanoparticles via the colloidal-route. The structural nature and optical properties of the as-synthesized nanoparticles ... -
Coordination behaviours of new (bidentate N,O-chelating) Schiff bases towards copper(II) and nickel(II) metal ions: synthesis, characterization, antimicrobial, antioxidant, and DFT studies
Ekennia, Anthony C.; Osowole, Aderoju A.; Olasunkanmi, Lukman O.; Onwudiwe, Damian C.; Ebenso, Eno . (SpringerSpringer, 2017)Two Schiff bases, HL1 and HL2, were synthesized in two different reactions involving 2-hydroxynaphthaldehyde with 2-amino-6-methylbenzothiazole and 2-amino-6-florobenzothiazole respectively. Copper(II) and nickel(II) ... -
Eco-friendly synthesis of AgNPs using Verbascum thapsus extract and its photocatalytic activity
Elemike, Elias E.; Onwudiwe, Damian C.; Mkhize, Zimbili (Elsevier, 2016)A facile eco-friendly synthesis of silver nanoparticles (AgNPs) using Verbascum thapsus (V. thapsus) flower extract as reducing as well as stabilizing agent is reported. The morphology of the synthesized Ag-NPs was spherical ... -
Effect of methyl substituent in pyridine on the spectral and thermal properties of pyridyl adducts of Zn(II) and Cd(II) dithiocarbamate
Onwudiwe, Damian C.; Strydom, Christien A.; Hosten, Eric C. (Elsevier, 2013)Four novel pyridine and 2-methyl pyridine adducts of Zn(II) and Cd(II) N-methyl-N-phenyl dithiocarbamates, [Zn(mpdtc)2py], [Zn(mpdtc)2mpy], [Cd(mpdtc)2py2], and [Cd(mpdtc)2mpy] (mpdtc = N-methyl-Nphenyl dithiocarbamates, ... -
Effect of some nitrogen donor ligands on the optical and structural properties of CdS nanoparticles
Onwudiwe, Damian C.; Strydom, Christien A.; Oluwafemi, Oluwatobi Samuel (RSC, 2013)The cadmium complex of N-ethyl-N-phenyl dithiocarbamate, 1, and its 2,20-bipyridine and 1,10-phenanthroline adducts, 2, and 3, respectively, have been used as single source precursors for the synthesis of CdS nanoparticles. ... -
Effect of temperature on the optical and structural properties of hexadecylamine capped ZnS nanoparticles using Zinc(II) N-ethyl-N-phenyldithiocarbamate as single source precursor
Onwudiwe, Damian C.; Strydom, Christien; Oluwafemi, Oluwatobi S.; Songca, Sandile P. (Elsevier, 2012)Reported in this work is the synthesis of HDA (hexadecylamine)-capped ZnS nanoparticles by a single source route using Zinc(II) N-ethyl-N-phenyldithiocarbamate as a precursor. By varying the growth temperature, the ... -
Fe(II) and Fe(III) complexes of N-ethyl-N-phenyl dithiocarbamate: electrical conductivity studies and thermal properties
Onwudiwe, Damian C.; Strydom, Christien A.; Arfin, Tanvir (Elsevier, 2014)The electrical conductivity and thermal properties of Fe complexes in different oxidation states of (II)and (III) have been studied using the compounds Fe (II) bis (N-ethyl-N-phenyl dithiocarbamate), andFe (III) tris ... -
Green synthesis of Ag/Ag2O nanoparticles using aqueous leaf extract of eupatorium odoratum andIts antimicrobial and mosquito larvicidal activities
Elemike, Elias E.; Onwudiwe, Damian C.; Ekennia, Anthony C.; Sonde, Christopher U.; Ehiri, Richard C. (MDPI, 2017)The health challenges associated with pathogens and ectoparasites highlight the need for effective control approaches. Metal nanoparticles have been proposed as highly effective tools towards combatting different microbial ... -
Laser assisted solid state reaction for the synthesis of ZnS and CdS nanoparticles from metal xanthate
Onwudiwe, Damian C.; Strydom, Christien A.; Krüger, Tjaart P.J. (Elsevier, 2014)Nanoparticles of CdS and ZnS were produced by a nanosecond laser using zinc (II) and cadmium (II) complexes of ethyl xanthate. Laser pulses with a peak wavelength of 355 nm, pulse repetition rate of 10 Hz, and pulse ... -
Laser-assisted synthesis, and structural and thermal properties of ZnS nanoparticles stabilised in polyvinylpyrrolidone
Onwudiwe, Damian C.; Krüger, Tjaart P.J.; Jordaan, Anine; Strydom, Christien A. (Elsevier, 2014)Zinc sulphide (ZnS) nanoparticles have been synthesised by a green approach involving laser irradiation of an aqueous solution of zinc acetate (Znac2) and sodium sulphide (Na2S·9H2O) or thioacetamide (TAA) in polyvinylpyrrolidone ... -
Nanosecond laser irradiation synthesis of CdS nanoparticles in a PVA system
Onwudiwe, Damian C.; Strydom, Christien A.; Krüger, Tjaart P.J.; Oluwafemi, Oluwatobi S. (Elsevier, 2014)We herein report a modified, in situ photolytic process for the nucleation and growth of cadmium sulphide nanoparticles in the presence of an optically transparent and semicrystalline polyvinyl alcohol (PVA) polymer ... -
Palladium(II) and platinum(II) complexes of N-butyl-N-phenyldithiocarbamate: synthesis, characterization, biological activities and molecular docking studies
Onwudiwe, Damian C.; Mogwase, Boitumelo M.S.; Ekennia, Anthony C.; Olubiyi, Olujide O.; Hosten, Eric (Elsevier, 2016)The reaction of ammonium N-butyl-N-phenyldithiocarbamate with the chloride salts of platinum and palladium, at room temperature, leads to the formation of [PtL2] and [PdL2](L = N-butyl-N-phenyldithiocarbamate). These ...